package com.sky.service.impl;

import com.sky.entity.Orders;
import com.sky.mapper.OrderMapper;
import com.sky.mapper.ReportMapper;
import com.sky.mapper.UserMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import org.apache.commons.lang.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

@Service
public class ReportServiceImpl implements ReportService {

    @Autowired
    private ReportMapper reportMapper;

    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private UserMapper userMapper;

    @Autowired
    private WorkspaceService workspaceService;

    /**
     * 营业额统计接口
     * @param begin
     * @param end
     * @return
     */
    @Override
    public TurnoverReportVO turnoverStatistics(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate>  dateLists  =new ArrayList<>();
        while (begin.isBefore(end) ||  begin.isEqual(end)){
            dateLists.add(begin);
            begin= begin.plusDays(1);
        }

        ArrayList<Double> turnoverList=new ArrayList<>(dateLists.size());

        for (LocalDate dateList : dateLists) {
            LocalDateTime beginTime = LocalDateTime.of(dateList, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(dateList, LocalTime.MAX);

            Map map =new HashMap();
            map.put("status", Orders.COMPLETED);
            map.put("begin",beginTime);
            map.put("end",endTime);

          Double turnover = orderMapper.getTurnover(map);
                turnover=  turnover==null? 0.0:turnover;
          turnoverList.add(turnover);

        }
        return TurnoverReportVO.builder()
                .dateList(StringUtils.join(dateLists,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    /**
     * /用户统计接口
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public UserReportVO userStatistics(LocalDate begin, LocalDate end) {
        ArrayList<LocalDate> localDates=new ArrayList<>();
        while (begin.isBefore(end)||begin.isEqual(end)) {
            localDates.add(begin);
            begin=begin.plusDays(1);
        }
        List<Integer> newUserList = new ArrayList<>(localDates.size()); //新增用户数
        ArrayList<Integer> totalList=new ArrayList<>(localDates.size()); //总的用户

        for (LocalDate date : localDates) {
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            //新增用户数量 select count(id) from user where create_time > ? and create_time < ?
            Integer newUser = getUserCount(beginTime, endTime);
            //总用户数量 select count(id) from user where  create_time < ?
            Integer totalUser = getUserCount(null, endTime);

            newUserList.add(newUser);
            totalList.add(totalUser);
        }

        return  UserReportVO.builder().dateList(StringUtils.join(localDates,","))
                .newUserList(StringUtils.join(newUserList,","))
                .totalUserList(StringUtils.join(totalList,",")).build();


    }

    /**
     * 根据时间区间统计订单数量
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public OrderReportVO ordersStatistics(LocalDate begin, LocalDate end) {

        ArrayList<LocalDate> dateList=new ArrayList<>();
        while (begin.isBefore(end)|| begin.isEqual(end)){
            dateList.add(begin);
            begin=begin.plusDays(1);
        }
        //每天订单总数集合
        ArrayList<Integer> orderCountList=new ArrayList<>();

        //每天有效订单数集
        ArrayList<Integer> validOrderCountList=new ArrayList<>();
        for (LocalDate localDate : dateList) {
            LocalDateTime beginTime = LocalDateTime.of(localDate, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(localDate, LocalTime.MAX);
            //查询每天的总订单数
             Integer orderCount=  getOrderCount(beginTime,endTime,null);
            //查询每天的有效订单数
             Integer validOrderCount= getOrderCount(beginTime,endTime,Orders.COMPLETED);
             orderCountList.add(orderCount);
             validOrderCountList.add(validOrderCount);
        }
        //时间区间内的总订单数

        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();
        //时间区间内的总有效订单数
        Integer validOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();
        //订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount!=null){
        orderCompletionRate=validOrderCount/totalOrderCount.doubleValue();
        }
        return OrderReportVO.builder()
                .dateList(StringUtils.join(dateList,","))
                .orderCompletionRate(orderCompletionRate)
                .orderCountList(StringUtils.join(orderCountList,","))
                .totalOrderCount(totalOrderCount)
                .validOrderCount(validOrderCount)
                .validOrderCountList(StringUtils.join(validOrderCountList,","))
                .build();
    }

    /**
     * 查询指定时间区间内的销量排名top10
     *
     * @param begin
     * @param end
     * @return
     */
    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesVo> goodsSalesVoList=orderMapper.getSalesTop10(beginTime,endTime);

        List<String> nameList = goodsSalesVoList.stream().map(item -> {
            return item.getName();
        }).collect(Collectors.toList());

        List<Integer> numberList = goodsSalesVoList.stream().map(item -> {
            return item.getNumber();
        }).collect(Collectors.toList());



        return SalesTop10ReportVO.builder()
                .nameList(StringUtils.join(nameList,","))
                .numberList(StringUtils.join(numberList,","))
                .build();
    }

    /**
     * 导出近30天的运营数据报表
     *
     * @param response
     */
    @Override
    public void exportBusinessData(HttpServletResponse response) {
        LocalDate begin = LocalDate.now().minusDays(30);
        LocalDate end = LocalDate.now().minusDays(1);
        //查询概览运营数据，提供给Excel模板文件
        BusinessDataVO businessDataVO = workspaceService.businessData(LocalDateTime.of(begin, LocalTime.MIN), LocalDateTime.of(end, LocalTime.MAX));

        InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");

        try {
            //基于提供好的模板文件创建一个新的Excel表格对象
            XSSFWorkbook  xssfWorkbook = new XSSFWorkbook(inputStream);
            //获得Excel文件中的一个Sheet页
            XSSFSheet sheet = xssfWorkbook.getSheet("Sheet1");
            sheet.getRow(1).getCell(1).setCellValue(begin+"至"+end);
            //获得第4行
            XSSFRow row = sheet.getRow(3);
            //获取单元格
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            XSSFRow row1 = sheet.getRow(4);
            row1.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row1.getCell(4).setCellValue(businessDataVO.getUnitPrice());


            for (int i = 0; i < 30; i++) {
                 businessDataVO = workspaceService.businessData(LocalDateTime.of(begin.plusDays(i), LocalTime.MIN), LocalDateTime.of(begin.plusDays(i), LocalTime.MAX));

                XSSFRow row2 = sheet.getRow(7 + i);
                row2.getCell(1).setCellValue(begin.plusDays(i).toString());
                row2.getCell(2).setCellValue(businessDataVO.getTurnover());
                row2.getCell(3).setCellValue(businessDataVO.getValidOrderCount());
                row2.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
                row2.getCell(5).setCellValue(businessDataVO.getUnitPrice());
                row2.getCell(6).setCellValue(businessDataVO.getNewUsers());
            }
            //通过输出流将文件下载到客户端浏览器中
            ServletOutputStream outputStream = response.getOutputStream();
            xssfWorkbook.write(outputStream);
            //关闭资源
            outputStream.flush();
            outputStream.close();
            xssfWorkbook.close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public Integer getOrderCount(LocalDateTime beginTime, LocalDateTime endTime,Integer status) {
        Map map = new HashMap();
        map.put("begin", beginTime);
        map.put("end", endTime);
        map.put("status", status);
        return orderMapper.countByMap(map);
    }
    /**
     * 根据时间区间统计用户数量
     * @param beginTime
     * @param endTime
     * @return
     */
    public Integer getUserCount(LocalDateTime beginTime, LocalDateTime endTime) {
        Map map =new HashMap();
        map.put("begin", beginTime);
        map.put("end", endTime);
         return userMapper.countByMap(map);
    }
}
